Objective evaluation of regional crustal stability in a city is of vital significance to safety and sustainable development of the City.  Geological survey in Harbin, Heilongjiang Province was conducted to examine the Moho depth, geophysical field, igneous rocks and historical earthquake records, and in Harbin area the magnetotelluric sounding, drilling and mercury vapor survey were carried out. The results show that the crust structure in Harbin area is continuous, complete and stable, and earthquake activities of more than moderate intensity will not occur.